Why physical fitness does not rule out underlying heart problems.
Many people believe that staying physically active, maintaining a healthy body weight, and exercising regularly are enough to protect them from heart disease.
But is that always true?
Imagine someone who jogs every morning, has a slim body, and appears much fitter than people of the same age. One day, during a running competition, that person suddenly collapses.
It is a frightening reminder that looking healthy does not always mean the heart is completely healthy.
Regular exercise is one of the best ways to support cardiovascular health. However, some heart conditions can develop quietly, without obvious symptoms.
Understanding this difference may help us take better care of our hearts.
1. Fitness Does Not Eliminate Every Heart Risk
Regular physical activity can improve cardiovascular fitness, help manage blood pressure, support healthy cholesterol levels, and reduce the risk of several chronic diseases.
However, exercise cannot eliminate every possible cause of heart disease.
Some people may have underlying conditions such as:
Coronary artery disease, in which the blood vessels supplying the heart become narrowed.
Abnormal heart rhythms, which can sometimes cause dizziness or fainting.
Heart muscle conditions that affect the heart's structure or function.
Heart valve problems that may develop over time.
Some of these conditions may remain undetected until symptoms appear.
A person can therefore be physically active and still have a heart condition that requires medical attention.
2. A Healthy Body Weight Does Not Tell the Whole Story
Many people associate heart disease with obesity.
Although excess body weight can increase certain health risks, people who are slim or physically fit can also develop cardiovascular problems.
Other important risk factors include:
High blood pressure
High blood pressure often has no noticeable symptoms. Over time, it can place additional strain on the heart and blood vessels.
High cholesterol
Elevated LDL cholesterol can contribute to the buildup of fatty deposits in the arteries, increasing the risk of cardiovascular disease.
Diabetes and high blood sugar
Diabetes can damage blood vessels and increase the risk of heart disease.
Smoking
Smoking damages blood vessels and increases cardiovascular risk.
Age and family history
The risk of cardiovascular disease generally increases with age. A family history of certain heart conditions may also be relevant.
These factors are not always visible from a person's appearance.
3. Can Heart Disease Develop Without Warning?
Yes. Some cardiovascular conditions may develop gradually without obvious symptoms.
A person may continue working, walking, or exercising while an underlying problem remains undetected.
However, other people experience warning signs that are easy to overlook.
Possible symptoms include:
Unusual shortness of breath during physical activity.
Chest discomfort, pressure, or tightness.
Dizziness or feeling faint.
Unexplained fatigue.
A racing or irregular heartbeat.
Reduced exercise tolerance compared with previous months.
These symptoms can have many causes and do not automatically mean someone has heart disease.
Nevertheless, new, unexplained, or recurring symptoms deserve medical attention.
Important: Chest discomfort, severe breathlessness, fainting during exercise, or other sudden concerning symptoms should not be ignored.
4. Why Can Someone Collapse During Exercise?
Exercise increases the heart's workload. The heart beats faster and pumps more blood to supply the muscles.
For most people, this is a normal and beneficial response.
However, in someone with an underlying heart condition, strenuous exercise may sometimes trigger a serious problem.
Possible causes of collapse during or after exercise include:
A dangerous abnormal heart rhythm.
A heart attack.
Sudden cardiac arrest.
Severe dehydration or heat-related illness.
Other medical conditions affecting blood circulation.
These conditions are different, and not every collapse is caused by a heart problem.
It is also important to understand that cardiac arrest and heart attack are not the same thing.
A heart attack occurs when blood flow to part of the heart muscle is blocked.
Cardiac arrest occurs when the heart suddenly stops pumping blood effectively, often because of an electrical problem.
A heart attack can sometimes lead to cardiac arrest, but cardiac arrest can also occur for other reasons.
If someone collapses suddenly, becomes unresponsive, and is not breathing normally, call emergency services immediately. Begin CPR and use an automated external defibrillator (AED) if available. Follow the emergency dispatcher's instructions.
In Malaysia, call 999 for emergency assistance.
5. Should Older Adults Continue Jogging?
Absolutely. Age alone does not mean that a person must stop exercising.
Regular physical activity can help older adults maintain strength, balance, mobility, and cardiovascular health.
However, exercise should be appropriate for the individual's health and fitness level.
For older adults who are beginning a new exercise programme, increasing exercise intensity, or returning after a long period of inactivity, a discussion with a healthcare professional may be helpful.
This is particularly important for people with known heart disease, diabetes, uncontrolled blood pressure, or symptoms during exercise.
A medical assessment can help determine whether any additional precautions are needed.
The goal is not to create fear of exercise.
The goal is to exercise safely and consistently.
6. How Can You Take Better Care of Your Heart?
You do not need to wait until you experience symptoms to pay attention to your cardiovascular health.
Here are some practical steps:
Check your blood pressure.
High blood pressure may not produce noticeable symptoms. Regular measurement can help identify a problem.
Know your cholesterol levels.
A blood test can help assess cholesterol levels and support a discussion about cardiovascular risk.
Monitor your blood sugar.
Diabetes and prediabetes can sometimes develop without obvious symptoms. Ask your healthcare professional whether screening is appropriate.
Stay physically active.
Walking, swimming, cycling, and other suitable activities can support heart health.
Eat a balanced diet.
Include vegetables, fruits, whole grains, legumes, and suitable sources of protein. Limit excessive salt, added sugar, and foods high in saturated fat.
Avoid smoking.
Smoking is an important and preventable cardiovascular risk factor.
Pay attention to changes in your body.
If your usual exercise suddenly feels much harder, or you experience unusual breathlessness, chest discomfort, or dizziness, seek medical advice.
Looking Healthy Is Not the Same as Being Healthy
A person who jogs every morning may have excellent physical fitness.
But physical fitness alone cannot tell us everything about the condition of the heart.
Some cardiovascular problems develop quietly. Others may produce symptoms that people dismiss as tiredness, ageing, or simply being out of shape.
The good news is that many cardiovascular risk factors can be identified through appropriate health checks, and many can be managed with lifestyle changes and medical care.
We should continue to exercise, enjoy life, and stay active.
At the same time, we should remember that taking care of our hearts involves more than maintaining a healthy body weight or running a certain distance.
A healthy lifestyle is important. Knowing your health risks is equally important.
Your heart works for you every day. Give it the attention it deserves.
Health Disclaimer: This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Individual health risks vary. Consult a qualified healthcare professional about your personal cardiovascular health. If you experience symptoms of a possible heart attack or sudden cardiac arrest, seek emergency medical assistance immediately.
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